How should we call to Allah? -Shaykh ibn al-‘Uthaymeen

By Shaykh Muhammad bin Saalih al-’Uthaymeen may Allah have mercy on him

“(call to Allah) with gentleness, softness, and conviction with evidences based on Athari and Nadhari. Athari are evidences based on the Kitaab and Sunnah, and Nadharee are evidences based on the intellect/reason. That is because the non-Muslim does not take evidence from Quran and Sunnah. However if you use reason they will accept. Also, I advise you to call them through your actions.